JPH01272015A - Operating device for switch - Google Patents

Abstract

PURPOSE:To prevent failure in operation of a movable contactor due to such causes as scuffing at a link by giving a stop signal to a motor for energizing a spring after detecting the termination of operation of the movable contactor. CONSTITUTION:When a gear member 2 is driven with a motor 1, the force is transmitted to a spring lever 3 to energize the spring, which, when it is moved beyond a preset position, release its energy to rotate a driving lever 4 rapidly, thereby closing through a link mechanism 13 a movable contactor. If the movable contactor stops midway due to scuffing on the link mechanism 13, etc., a detecting device 6a sends no output because the driving lever 4 can not reach the terminal edge, and the motor 1 does not stop. The gear member 2 is further rotated counterclockwise, and the joint 2d of the member 2 is apposed to the joint 3a of the spring lever 3 to rotate the apposed and jointed driving lever 4 in the same direction as that of the spring lever 3. Further, the movable contactor 14 is operated through the link mechanism 13, and the driving lever 4 reaches the terminal edge so that the detecting device 6a detects it and the motor 1 stops. This contrivance can be surely operated while working as a spring-operated device, as a motor-driven device in case of accidents.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a switch operating device, and more particularly to a switch operating device using an electric motor in a drive system.

[Prior Art] Generally, a disconnector, a grounding switch, etc. known as a power switch are constructed using a motor operating device that uses an electric motor as its drive source.

An example of a conventional electric motor operating device is the Japanese Patent Publication No. 62-1714.
This is shown in FIGS. 6 and 7. Fig. 6 is a partially sectional front view, and Fig. 7 is a - A- in Fig. 6.
It is an A-line sectional view.

The electric motor 1 has a spur gear 2a fixed to its drive shaft.

It is connected to a spur gear 2b fixed to the main shaft 18.

A threaded portion 16 is formed on this main shaft 18, and a slider 17 screwed into this threaded portion 16 is attached to drive hinges 19a on both sides.
, 1.9b, the rotation of the main shaft 18 is converted into movement in the axial direction and is received by a pair of main levers 8a, 8b that regulate the rotation of the main shaft 18. This movement of the slider 17 to the right in FIG.
, 8b into the engagement grooves, the main lever 8a is rotated counterclockwise. Therefore, the rotation of the main levers 8a, 8b operates the movable contacts of the switch via the external drawer lever 10 coupled to the operating shaft 9 and an operating rod (not shown).

Rotation of the electric motor 1 in the opposite direction causes the operation shaft 9 to rotate in the opposite direction, and the movable contact of the switch is operated in the opposite direction via the external drawer lever 1o and an operation iron (not shown).

In this way, the electric motor can open and close the switch. However, such a motor operating device is suitable for a switch with relatively slow operating characteristics, but is not suitable for a switchgear that requires rapid operating characteristics. Therefore, spring operating devices are used in switching devices that require rapid operating characteristics, and examples of this type of operating device include 1, for example, JP-A-56-74721 and JP-A-59-16371.
It is introduced in Publication No. 9.

These spring operation devices use an electric motor in the drive system, but the electric motor is configured to be operated only while the spring is being energized, and to be stopped after the spring is energized.

[Problems to be Solved by the Invention] Conventional switch operating devices have the above-mentioned configuration, so 1. For example, when many types of switches are installed in parallel in the vicinity, such as in a gas-insulated switchgear, the required operation is difficult. A motor operating device and a spring operating device, which are selected based on their characteristics, are sometimes placed side by side, and their basic configurations are completely different, making maintenance and inspection troublesome.

In addition, in the case of spring-operated devices, although the spring provides rapid operating characteristics, galling may occur in the link mechanism from the spring to the movable contact of the switch, or the load may increase for some reason. Then, this exceeds the spring force and becomes inoperable, or the movable contact is left in a state in the middle of opening. ! I don't like it from a relationship perspective.

SUMMARY OF THE INVENTION An object of the present invention is to provide a switch operating device that prevents non-operation due to galling of the link mechanism.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a drive lever connected to a movable contact of a switch via a link mechanism, a spring lever connected to one end of a spring, and an electric motor. gear members that receive rotational force are rotatably arranged on the same main shaft, and the spring lever is connected to a predetermined position in the direction of rotation of the gear member by an electric motor to bias the spring, A gear member and the spring lever are connected so that the spring lever operates separately from the gear member by the releasing force of the spring when the spring lever passes the predetermined position, and the spring lever is released after the spring lever passes the predetermined position. The drive lever and the spring lever are connected to each other so as to transmit force to the drive lever, and detection means is provided for detecting the end position of the drive lever, and the electric motor is stopped when detected by the detection means. It is characterized by the following.

[Function] Since the switch operating device according to the present invention has the above-described configuration, when the gear member is first driven by the electric motor, this force is directly transmitted to the spring lever and biases the spring. After completing the biasing and reaching the predetermined position, the spring lever is separated from the gear member and rotated by the releasing force, transmitting this rotational force to the drive lever and operating the movable contact through the linkage mechanism. can. During this operation, if the movable contact does not reach the normal operating end position due to galling of the link mechanism, the detecting device will not detect the operating end position of the drive lever, and the motor will continue to operate. The gear member that rotates after the lever is connected in the same direction as the spring lever, and the spring lever is then driven by the electric motor to open and move the movable contact to its normal end of operation, and only then does the detection means operate. to stop the motor. Therefore, it is possible to obtain a switch operating device that prevents non-operation due to galling of the link mechanism and the like.

Also, if the spring is removed from the spring lever, the gear member, spring lever, and drive lever will be directly connected in the same rotational direction by the rotational force of the electric motor transmitted to the gear member, and the movable contact of the switch will be directly connected by the electric motor. A motor operating device for operating the motor can be easily obtained. Therefore, since the spring operating device and the electric motor operating device have the same basic configuration, it is easy to change between the two operating devices, and maintenance and inspection thereof is also facilitated.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a switch operating device according to an embodiment of the present invention, which corresponds to a conventional spring operating device.

A worm gear 2c is connected to the rotating shaft of the electric motor 1, and a gear member 2 such as a worm wheel meshed with the worm gear 2c is rotatable with respect to a main shaft 5 which is fixed in position. In addition to the gear member 2, a spring lever 3 and a drive lever 4 are rotatably fitted onto the main shaft 5 in a predetermined connection relationship. The spring lever 3 has one end fixed to a fixed member, and the other end of a spring 11 is removably connected, and the drive lever 4 has a roller 12.
is provided, and a main lever 8 is provided to engage with this roller 12. An external drawer lever 10 is provided on the operating shaft 9 of the main lever 8, and rotation of the main lever 8 is transmitted as rotation of the external drawer lever 10. The external drawer lever 10 is connected to a movable contact 14 of the switch via a link mechanism 13, which is schematically shown. A stopper 7a is provided at the final end of the operation of the drive lever 4, that is, at a position corresponding to the open position and the closed position of the movable contact 14 of the switch, respectively.
7b, and detection means 6a, 6b such as limit switches are provided, and this detection means 6a.

6b is configured to turn off the electric motor 1 when the drive lever 4 is detected.

Next, the connection relationship between the gear member 2, the spring lever 3, and the drive lever 4 will be explained using FIG.

The gear member 2 has a connecting portion 2d at a portion facing the spring lever 3.
A connecting portion 3a is formed at a portion of the spring lever 3 facing the gear member. Further, a connecting portion 3b is formed at a portion of the spring lever 3 facing the drive lever 4, and a connecting portion 4a is formed at a portion of the driving lever 4 facing the spring lever 3.

A collar 5a fixed to the main shaft 5 is located between the spring lever 3 and the drive lever 4, so that a gap is maintained between the two to break the connection due to contact friction.

The details of the connection relationship between the respective connection parts will be further clarified by the operation explanation using FIG. 1.

Assume that the state shown in Figure 1 is the open circuit state of the switch.

When the spring 11 is released, it acts to rotate the spring lever 3 clockwise, and the rotational force of the spring lever 3 is applied to the drive lever 4 clockwise via the connecting parts 3b and 4a in FIG. A rotating force in the direction is applied to hold the movable contact 14 in the illustrated state.

On the other hand, when a circuit closing command is given, the electric motor 1 is activated and the gear member 2 is rotated counterclockwise by the worm gear 2c and the worm wheel. Then, the connecting portion 2 of the gear member 2
The counterclockwise end surface of d abuts the clockwise end surface of the connecting portion 3a of the spring lever 3, and subsequent rotation of the gear member 2 causes the spring lever 3 to rotate in the same counterclockwise direction. As the spring lever 3 rotates, the spring 11 is compressed and biased as shown in FIGS. 3(a) to 3(b). And Figure 3 (
When the toggle mechanism made by the spring 11 and the spring lever 3 crosses the dead center as shown in C), the connection part 3 of the spring lever 3
The counterclockwise end face of b comes into contact with the clockwise end face of the drive lever 4, and the releasing force of the spring 11 gives the spring lever 3 a rapid counterclockwise rotation, and the same rotation is applied to the drive lever 4 as well. Given. Since the rotation at this time is faster than the rotation in the same direction given to the gear member 2 by the electric motor 1, it precedes the rotation of the gear member 2 in the same direction. Therefore, between the gear member 2 and the spring lever 3.

The biasing force of the spring 11 from the gear member 2 is transmitted to the spring lever 3, but the releasing force of the spring 11 is not transmitted to the gear member 2. On the other hand, the releasing force of the spring 11 is transmitted to the drive lever 4, which rotates the main lever 8 clockwise around the operating shaft 9, and also rotates the external drawer lever 1o clockwise, causing the movable contact 14 is closed. The closed circuit position of the movable contactor 14 is regulated by the drive lever 4 coming into contact with the stopper 7a, which is also detected by the detection means 6a and the electric motor 1 is stopped.

During this operation, if galling occurs in the link mechanism 13, for example, and the spring 11 does not move to the position shown in FIG. There is no detection by means 6a. Therefore 2 motors 1
The stop command was not given, and the gear member 2 further rotated counterclockwise, and the connecting portion 3 of the spring lever 3, which had stopped midway,
The connecting portion 2d of the gear member 2 contacts a, and the spring lever 3 and the drive lever 4, which is connected in the same direction as the spring lever 3, are rotated counterclockwise, and the drive lever 4 is operated. The detection means 6a detects the final end and the electric motor 1 stops.

In this way, even if galling or the like occurs in the link system, the movable contactor 14 is not left in an unfinished state and can always be moved to the final position.

To operate the switch in the opposite direction, the electric motor 1 is rotated in the opposite direction, and the gear member 2 is rotated clockwise to rotate the connecting portion 2.
The clockwise end surface of d is brought into contact with the counterclockwise end surface of the connecting portion 3a of the spring lever 3, and the spring levers 3 are both rotated clockwise. Due to the rotation of the spring lever 3, the spring 11 is compressed and urged, and the spring 1 passes through the state shown in FIG. 3(b).
1 and a spring lever 3. At this time, the clockwise end surface of the connecting portion 3b of the spring lever 3 comes into contact with the counterclockwise end surface of the connecting portion 4a of the drive lever 4, and the releasing force of the spring 11 gives both of them a faster rotation than from the gear member 2. It will be done.

Therefore, the movable contactor 14 is opened by the spring 11, and the end position of the drive lever 4 hits the stopper 7b, which is detected by the other detection means 6b and the motor 1
is stopped.

If galling occurs during this operation and the drive lever 4 does not move to the final position, it is driven to the final position by the electric motor 1 as in the case described above.

During these two-direction operations, as shown in FIG. 2, the spacing between the spring lever 3 and the drive lever 4 is maintained by the collar 5a, so that the drive lever 4 is kept in friction while the spring 11 is biased by the spring lever 3. There is no possibility of rotation due to connection.

In this way, a switch operating device is obtained that has higher reliability than conventional spring operating devices. Further, FIG. 4 shows a case where the switch operating device shown in FIG. 1 is used as a conventional electric motor operating device.

In this usage mode, the spring 11 shown in FIG. 1 is removed, but the other configurations are the same.

In this case, operation in either direction is carried out by the electric motor 1 from beginning to end. Looking at the connection of each member 2, 3 and 4 in both rotational directions, the connection parts 2d, 3a, 3b
, 4a, but this play is removed by the initial rotation of the electric motor 1 and is connected in the rotational direction, after which the movable contact 14 can be operated by rotating the two together.

When various switches are configured in close proximity, such as in gas-insulated switchgear, each switch uses a spring operation device, a motor operation device, etc. depending on the required operating characteristics, but they are basically the same. Because of this configuration, maintenance and inspection of these operating devices becomes easy.

By the way, during maintenance and inspection of a switch, there are cases where it is desired to stop the movable contact midway through operation in order to check the state of the movable contact. This is possible when used as a motor operating device as shown in FIG.

FIG. 5 is a perspective view of a main part of the operating device which is used as the spring operating device of FIG. 1 so as to be able to stop the movable contact midway through operation.

The operating device shown in FIG. 1 described above has a structure in which the gear member 2, the spring lever 3, and the drive lever 4 are rotatably arranged in parallel to the main shaft 5. A series of holes 1 to connect the two in the direction
Form 6 etc.

The pins 15 may be inserted into the series of holes 16 when necessary. Due to the connection by the connecting pin 15, even if the spring 11 (not shown) tries to rotate the spring lever 3, the rotation is prevented by the gear member 2 integrated with the spring lever 3 and the worm gear 2C meshed with the gear member 2. Therefore, the movable contact driven by the rotation of the electric motor 1 can be stopped at any position. Therefore, in order to realize this, it is preferable that the gear member 2 is a worm wheel, and the connection between the gear member 2 and the spring lever 3 in the rotational direction is not limited to the hole 16 and the connecting pin 15. Therefore, the gear member 2 and the spring lever 3 may be formed in advance with a connecting member attachment portion for connecting them in the rotational direction.

[Effects of the Invention] As explained above, in the present invention, the stop command for the electric motor that energizes the spring is given after the end of the operation of the movable contact is detected by the detection means. The movable contact can be reliably driven to the end of its operation by the electric motor.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a switch operating device according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the main part of FIG. 1, and FIG. 3(a)
- (d) are side views showing the operation of the toggle mechanism in Fig. 1, Fig. 4 is a perspective view of a switch operating device according to another embodiment of the present invention, and Fig. 5 shows details of the main parts of Fig. 1. The perspective view shown, FIGS. 6 and 7 are a partially sectional front view showing a conventional operating device, and a sectional view taken along the line AA in FIG. 6. 1... Electric motor, 2... Gear member, 2c
...Worm gear, 3...Spring lever, 4.Old...Drive lever, Death...Main shaft, 5a...
...Brim, 6a...Detection means, 11...
...Spring, 14...Movable contact, 15...
...Connecting pin, 16...hole. Fig. 1 14 Possible in 搏η [te Fig. 2 Fig. 3 Fig. 4

Claims (1)

[Claims] 1. A drive lever connected to a movable contact of the switch via a link mechanism is driven via a gear member that receives rotational force from an electric motor to open and close the movable contact. In the switch operation position, on the main shaft, the above-mentioned drive lever and
A spring lever connected to one end of a spring and the gear member are rotatably arranged, and the spring lever is connected to a predetermined position in a direction of rotation of the gear member by the electric motor to bias the spring, The gear member and the spring lever are connected so that the spring lever is separated from the gear member and operated by the release force of the spring when the predetermined position is passed, and the release force of the spring is applied to the drive lever. The spring lever and the drive lever are connected to each other so as to transmit a signal to the movable contact, and a detection means is provided for detecting the end position of the movable contact, and the electric motor is stopped when the detection means detects the end position of the movable contact. A switch operating device characterized by: 2. In the device according to claim 1, a worm wheel is used as the gear member, and the worm gear provided on the rotating shaft of the electric motor is connected to the worm wheel, and the worm wheel and the spring lever are connected in the rotation direction thereof. An operating device for a switch, characterized in that a connecting member mounting portion is formed for the purpose of the operation. 3. The switch operating device according to claim 1, wherein a member is attached to the main shaft, the member being located between the spring lever and the drive lever and maintaining a distance between the two levers.